%0 Journal Article %A G. Ya. Kondrat'eva %A Huang Chi-khen %T Reaction of pyridine-3,4-dicarboxylic acids with hydrazine and aniline %J Doklady Akademii Nauk %D 1960 %P 94-97 %V 131 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_131_1_a23/ %G ru %F DAN_1960_131_1_a23